Improvement in saw-mills



UP. 6 a MC W D a 5 UNITED STATES PATENT OFFICE.

DENNIS LANE, OF MONTPELIER, VERMONT.

IMPROVEMENT IN SAW-MILLS.

Specilicaiionformiug part of Letters Patent No. 44, 100, dated September G, 186 1.

To aZZ whom it may concern;

Be it known that I, DENNIS LANE, of Mont pclicr, in the county of \Vashington, and State of Vermont, have invented a new and useful Lnprovement in Saw-Mill Carriages; and 1 do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being bad to the accompanying drawings, forming a part of this specification, in which- Figure 1 is an end view of my invention; Fig. 2-, a plan or top view of the same; Fig. 3, a section of a portion of the same, taken in the line as a", Fig. 1; Fig. 4, a detached view of afork pertaining to the same.

Similar letters of reference indicate like parts.

This invention relates to certain improve lllllliS in asaw mill carriage for which Letters Latent were granted to me, hearing date July 9, 1861, and January 12, 1864.

A represents the carriage, having uprights B attached to it, to which the log is secured by dogs 0. This carriage is fitted and works on two parallel ways, 1) D, each of which has a rack, E, secured permanently to it at the outer side. lnto these racks E E pinions F 1; gear, said pinions F being on the ends of a shaft, G, the bearings of which are attached to the carriage A; hence it will be seen that by turning the shaft G the carriage, with the log attached, may be moved back and forth and the log adjusted to the saw as required. The shaft Ur is turned by means of a lever, H, having a pawl, I, titted in it, which engages with any of a series of ratchets, J, on the shaft. This arrangement, being precisely like that formerly patented by me, does not require any particular description. By this arrangement it will be seen that the carriage may be operated or adjusted in any placel; which will receive the racks 15 E, whereas if the racks were attached to the carriage and 5 moved with it, as heretofore, considerablcf more space would be required to admit of the I movement of the racks; hence by this im- Z provement I can apply the carriage in cases a where a limited space would not admit of the previous invention being used. The ratchets J are all connected together on the shaft (l, and the former are provided with teeth of diffcrent sizes, in order to vary the setting move I ment of the carriage according to the thick I ness it is desired to cut the stutt from thclog, and the pawl I, which may be adjusted so as l to gear into any one of these ratchcts J, has a pin, (t, passing transversely through it, which, when the lever is drawn forward, comes in contact with a latch, K, when the latter is dropped forward on a hearing, I), which projects from a segment, L, on the carriage. This latch K, when thus adjusted, shortens the sweep of the lever H, and when it is thrown back a full sweep is allowed said lever.

M is a ratchet, which is attached to one side of the IatchetsJ, and has a dog, N, engaging with it. This dog is of curved form, as shown in Fig. 1, and it is pivoted to the segment L, as shown at c, the short part rl being the dog proper, and the long part (1 a lever which projects over in front of the ratchets J. This dog may thus be conveniently thrown out from the ratchet M by the pin a, when the pawl I is adjusted to move back the carriage. The upright B, at the end of the carriage opposite to that where the ratchets J work, has a vertical slide, 0, fitted in it, said slide having a rack-bar, c, projecting from its rear side. at right angles, into which a pinion or toothed segment-,f, at the end of the lever l, gears. This lover I is provided with a pawl, g, which catches into rack teeth on the rear of the upright. By this means I employ but a single rack and pinion or toothed segment for tlll jtlStlll; f the slide 0 to give a taper position to the log, whereas in my former invention a double rack and two pinions were employed.

Q is a fork, which is attached vertically to the carriage at such a point that it may receive and hold the dog 0. One or more of these forks may be used, according to the number of dogs employed. They admit of the dogs being readily grasped by the operator in adjusting a log to the carriage.

Having thusdescribcd my invcntitm, [claim as new and desi rc to secure by Letters Patent- 1. The dog N, applied to the segment L and bent or curved, as shown, to operate in connection with the ratchet i\[ and pin (t of pawl l, substantially as described.

2. The latch K, applied to the segment. 1., in connection with the pin (L of the pawl l, arranged substantially as shown, to regulate the sweep of lever ll.

DIQNNlS LANE.

Witnesses: 

